override func viewDidLoad() {
    super.viewDidLoad()

    /// Map functions
    self.setupAGSMap()
    self.routeTask = AGSRouteTask(url: URL(string: "http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Network/USA/NAServer/Route")!)
    //AGSCredential(user: "userName", password: "Password")
    let credentials = AGSCredential(token: "ymJiNe-cyWNApOwT1Fftp0XMejLraBFwTvOJy-Wfghx_mM3-2TiI6CKCPxScTGlsIN01MmwFZ1ZTUU-leQkg0dF0tbOE0aOyJglMNmABDrh_mDDHrXwaiGCPKRffUfpJw0Qb8Z4dgUXcwg4QmeonjmCMw..", referer: nil)
    self.routeTask.credential = credentials
    self.loadRouteTask()
}

func setupAGSMap() {
    self.showHUD()
    self.myInspectionMapView.interactionOptions.isMagnifierEnabled = false
    self.myInspectionMapView.backgroundColor = UIColor.white
    self.myInspectionMapView.touchDelegate = self
    self.myInspectionMapView.map?.maxScale = ArcGISConstants.maxScale
    weak var weakSelf = self
    self.myInspectionMapView.viewpointChangedHandler = {
        weakSelf?.mapZoomInOutHandler()
    }
    if checkConnectionTPKFileMissingAlert() {
        self.myInspectionMapView.loadBaseMap(urlString: ArcGISConstants.AGSMapTypeUrl.worldTopoMap) { [weak self] _ in
            if let viewObject = self {
                viewObject.addGraphicsOverlays()
                viewObject.hideHUD()
            }
        }
    } else {
        self.addGraphicsOverlays()
        self.hideHUD()
    }
}

/// function to load the route task
func loadRouteTask() {
    self.routeTask.load { [weak self] (error) -> Void in
        guard let weakSelf = self else { return }
        if let error = error {
            print(error)
            return
        }
        if (weakSelf.routeTask.loadStatus == .loaded) {
            print("route task is loaded")
        }
    }
}